package com.itheima.consul.controller;

import com.itheima.consul.domain.Goods;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import java.util.List;

/**
 * 服务调用方
 *
 * @author Chengfei
 * @date 2020/8/24 7:58
 */
@RestController
@RequestMapping("/order")
public class OrderController {
    @Autowired
    private RestTemplate restTemplate;
    @Autowired
    private DiscoveryClient discoveryClient;

    @GetMapping("/goods/{id}")
    public Goods findGoodsById(@PathVariable("id") int id) {

        //演示discoveryClient使用
        List<ServiceInstance> instances = discoveryClient.getInstances("consul-provider");

        //判断集合是否有数据
        if (instances == null || instances.size() == 0) {
            //集合没有数据
            return null;
        }

        ServiceInstance instance = instances.get(0);

        String host = instance.getHost();
        int port = instance.getPort();

        System.out.println(host);
        System.out.println(port);

        String url = "http://" + host + ":" + port + "/goods/findOne/" + id;

        System.out.println(url);

        //调用方法
        Goods goods = restTemplate.getForObject(url, Goods.class);

        System.out.println(goods);
        return goods;

    }

}
